Onboarding Friction for PSPs – Any Solutions for Expedited KYB?

We're a prop firm operating primarily in FX and metals. Our payout infrastructure relies heavily on several PSPs to manage various fiat rails globally. The initial KYB process with new PSPs, particularly for multi-entity structures and demonstrating liquidity sources, consistently extends for weeks, sometimes months. This bottleneck impacts our ability to scale quickly into new markets or diversify payment providers effectively. Does anyone have experience with platforms or services that streamline corporate onboarding for financial institutions like ours, specifically reducing the KYB burden without compromising compliance standards? We're looking for efficiency gains, not shortcuts. The due diligence requirements are understandable, but the execution often feels archaic.